Means for securing cords to lamp-sockets.



No. 877,383. 4 S PATENTED JAN. 21, 1908.

' RAJSWAN.

MEANS FOR SECURING CORDS T0 LAMP SOCKETS.

. APPLICATION FILED Isa-1111154907."

2 SHEETS-SHEET l.

N0. 877,383. PATENTED JAN. 21', 1908'.

.P. A. SWAN. MEANS FOR SECURING CORDS T0 LAMP SOCKETS.

APPLICATION FILED MAR.15.1907.

2 SHEETS-SHEET 2.

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. minals from this strain.

ing drawing, is a specification, like letters on descent lamp to the lamp soc at it has been knot rather than on the connection between likely to become broken thus causing a short my invention and then point out thenovel showing the way in which the device for reis, a side elevation of the socket with the v The socket herein shown comprises the FREDERICK A. SWAN, OF GL1 FTONDhLE, MASSACHUSETTS.

FQR SECURING- CGBDS T0 LP-SOCETS.

Specification of mo. erases.

I Application filed March 15.

To all whom it may concern:

Be it known that I, FREDERICK A. SWAN, a citizen of the United States, and a resident of Gliftondale, in the county of Essex and State of Massachusetts, have invented an Im rovement in Means for Securing Cords to ip-Sockets, of which the following description, in connectibn with the accompanythe drawing representing like parts.

- In securing the cords of a endent incancustomary to knot the cords within the cap of the socket so that the weight of the lamp, shade and other accessories will come on the the cords and the terminals, for if the Weight came on the latter the connection would be likely to become broken thus breaking the. circuit. One disadvantage of thus knotting the'cord is that in doing so the insulation is circuit.

The object of my invention is to provide novel means located within the socket'of the lamp to take the entire strain on the cords due to the weight of the lamp, thus relieving the connections between. the cords and ter- I will first describe-some embodiments of features thereof in the appended claimsi In the drawings, Figure 1 is a perspective view of a lamp socket with the cap removed showing one embodiment of my invention; Fig. 2 1s a side elevation of the socket with the cap in place, said. view showing the cap partly broken out to better illustrate the invention; Fig. 3 is a top plan view of the view thereof; Fig. 5 is a section on the line as :11, Fig. Fig. 6 is a perspective View lieving the terminals from strain is placed on the cords; Fig. 7 is a perspective view of a lamp socket with the cap removed showing" another embodiment of my invention; Fig. 8

lamp in place, said view showing the cap partly broken out to better illustrate-the construction; Fig. 9 is a perspective view of the strain-receiving means shown in Figs. 6 and 7.

shell 3 and the cap 4, which latter is made Letters Patent. Patented Jan. 21, 1908.

1907. Serial No. 362.582.

has the usual opening in its upper and through which the cords o'r wires 5 pass. These parts may be of any suitable or usual constructionand form no part oi my present invention.

According to my invention I place within the socket beneath the cap a device which is adapted to take the entire strain on the cord strain to which the cords may be subjected and to relieve the terminals from strain due to weight on or strain a plied to the cords, I will for convenience ereinafter refer to said device as strain-receiving means.

Referring first to the embodiment of the invention shown in Fig. 1 the strain-receiving means therein shown is in the form of a button 20 provided with apertures through which the cords 5 pass in such' a way that said cords are bent around portions of the hutt'on sufiicientl to preven them from be ing pulled through or out of said button. As herein shown, the button 20 is provided with a central aperture to receive both cords and a pair of apertures 22 and 23 for each cord. In using the device, the cords 5 are inserted through the central aperture 21 and then said cords are separated, and one cord is in serted up through one a erture 22 and the other cord through the ot er aperture 22 and then said cords are bent over passed down through the two apertures .23, as plainly shown in the drawings. The ends of the cords after extending down through the apertures 23 are securedto the terminals of the lampas usual. lrcierably the central a erture 21 Will be coni'iected with each of i is apertures 22 von the bottom of the but-' 4 detachable from the shell as usual. cap

v The passingof the cords through the ap nulus impinges either on the cap of the cient friction so that the entire weight of space between the porcelain member 10 to on the shell 3 in the usual manner.

ertures causes the cord to be held with sufiithe lamp will come on the strain-receiving device and thus be transmitted to'the socket and will not come on the connections between the cords 5 and the terminals of the lamp.

It will be noted that the button 20 fills the which the terminals are connected and the cap, and when the cap is on, said button forms a solid backing for the porcelain memher and holds it securely in position. This is an advantage because it prevents said porcelain from having any loose play in the socket and holds the lamp firmly in osition.

In the form of the invention s own in Figs. 7, 8 and 9, the strain-receiving means is in the nature of an annulus 6, and in using it the cords 5 extend from the terminals 11 around the annulus and then down through the aperture 7' therein then around the edge thereof, as shown at 8 in Figs. 7 and 8, and thence out through the a erture in the cap 4.

OWin to the way in w ich the cords 5 are threade 'through' the annulus 6, any strain on said cords due to the weight of the lamp or any other cause tends to turn the annulus bottom side up from the position shown in Fig. 8, and the edge 11 of said annulus is thus brought against the porcelain member 10 while the opposite side or edge 12 of said ansocket or on the portion 8 of the cords 5. The friction on the cord afforded by its passing around the edge of the annulus up through the center and over the edge thereof again is i suflicient so that any strain to which the cord is subjected'will he taken by the annulus and will not be transmitted to the terminals of the lamp. I y

In assembling the parts the annulus is slipped over the cord 5 with the face 13 there of, Fig. 7, on the underside, and when said annulus has slid down to the shell of the socket 3 it is turned over into the iosition shown in Figs. 7 and 8, thereby ben ing the cord about it, the caps may then be placfed g 'l llS i construction has the advantage that the i strain-receiving means is located entirely within the socket. The form of the/invention shown in Figs. 7 and 8 also has the advantage that the strain-receiving means 1 serves to keep the porcelain member 10 i pushed forward into its correct position and to hold it firmly in such position. l

" While I"have shown herein two forms of i strain-receivingmeans located within a socket, I wish it understood that my invention is not limited to these two constructions, since I believe I am the first to rovide a strain-receivin means located within the socket of the am 'I desire, therefore, to claim this feature broadly. Having fully described my invention, What I claim as new and desire to secure by Letters.

" Patent is 1. The combination with a lamp socket of conductor cords leading thereinto, and strain receiving means within the socket.

2. The combination with a lamp socket of conductor cords leadin thereinto, of means within the socket to rictionally hold said cords thereby to relieve the terminals from 75;

any strain.

3. The combination with a lamp socket of conductor cords'leading thereinto,a combined strain-receivin end lamp-positioning means within the soc (ct.

. 4. The combination with a lamp socket having a cap of conductor cords leading thereinto, and a 'strain receiving device witha in the cap, said strain-receiving device en+ gaging both the cap of the lamp and the terminal-carryin member of the lamp thereby serving to hold the latter firmly 1n posi tion.

5.T he combination with a lamp socket including a shell and a cap, of conductor cords leading thereto, and strain-receiving .means within said socket and having frictional engagement with the cords.

6. The combination with a lam socket including in its construction a shell and a cap, of conductor cords leading thereinto, and strain-receiving means separate from said socket located therewithin and having frictional engagement with said cords.

7. The combination with a lamp socket 100 comprising a porcelain member, a shell and a cap, of conductor cords leading thereinto, and a strain-receiving device separate from the porcelain member of the socket situ ated within the socket and having frictional 105 engagement with the cords.

In tcstlmony whereof, I have slgned my name to this specification, in the presence of two subscribing witnesses.

FREDERICK A. SWAN. Witnesses:

Loris C. SMITH, MARGARET A. DUNN. 

